KR920020848A - Scrambling signal switching circuit of pay broadcasting system - Google Patents

Scrambling signal switching circuit of pay broadcasting system Download PDF

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Publication number
KR920020848A
KR920020848A KR1019910005661A KR910005661A KR920020848A KR 920020848 A KR920020848 A KR 920020848A KR 1019910005661 A KR1019910005661 A KR 1019910005661A KR 910005661 A KR910005661 A KR 910005661A KR 920020848 A KR920020848 A KR 920020848A
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KR
South Korea
Prior art keywords
signal
microcomputer
processing unit
output
scramble
Prior art date
Application number
KR1019910005661A
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Korean (ko)
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KR940000941B1 (en
Inventor
백운길
Original Assignee
이헌조
주식회사 금성사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019910005661A priority Critical patent/KR940000941B1/en
Publication of KR920020848A publication Critical patent/KR920020848A/en
Application granted granted Critical
Publication of KR940000941B1 publication Critical patent/KR940000941B1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated

Landscapes

  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

내용 없음.No content.

Description

유료 방송 시스템의 스크램블링 신호 스위칭 회로Scrambling signal switching circuit of pay broadcasting system

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명의 구성블럭도.2 is a block diagram of the present invention.

제3도는 본 발명의 동작 플로우 챠트.3 is an operational flowchart of the present invention.

제4도는 제3도의 각부 파형도.4 is a waveform diagram of each part of FIG.

Claims (2)

TV방송신호를 동조하는 튜너(1)와 동조된 신호를 영상신호와 음성신호로 분리 출력하는 중간 주파수 처리부(2)를 갖는 것에 있어서, 스크램블링된 신호를 디스크램블링 하기 위한 디스크램블러(6)와, 상기 음성신호를 PCM처리하기 위한 PCM처리부(3)와, PCM처리부(3)로부터 출력되는 스크램블 식별신호를 카운트하여 그에따라 1씩 증가하는 데이터값을 출력하기 위한 스크램블 식별신호 카운터(7)와, 상기 스크램블 식별신호 카운터(7)의 출력신호를 일정주기로 리드하여 이를 설정된 값과 비교함으로써 스크램블 신호 유무를 판별하고 그에 따른 제어신호를 출력하기 위한 마이컴과, 상기 튜너(1)의 디스크램블러(6) 및 중간 주파수 처리부(2)사이에 접속되고 상기 마이컴(4)의 제어신호에 의해 튜너(1)의 출력신호가 스크램블링 신호일 경우는 디스크램블러(6)를 거쳐 정상 TV신호일 경우에는 직접 중간 주파수 처리부(2)에 인가되도록 스위칭하기 위한 스위칭부(8)를 포함함을 특징으로 하는 유료 방송 시스템의 스크램블링 신호 스위칭 신호.A tuner (1) for tuning a TV broadcast signal and an intermediate frequency processing unit (2) for separately outputting the tuned signal as a video signal and an audio signal, comprising: a descrambler (6) for descrambling a scrambled signal; A scramble identification signal counter (7) for counting the scramble identification signal output from the PCM processing section (3) for outputting the PCM processing unit 3; A microcomputer for determining the presence or absence of a scramble signal and outputting a control signal according to the output signal of the scramble identification signal counter 7 at a predetermined period and comparing it with a set value, and the descrambler 6 of the tuner 1. And the descrambler 6 when the output signal of the tuner 1 is a scrambling signal by the control signal of the microcomputer 4. When struck normal TV signal is scrambled signal switching signal from the pay-TV system, it characterized in that it comprises a switching unit 8 for switching to be applied directly to an intermediate frequency processing unit 2. 제1항에 있어서, 마이컴(4)의 리드주기를 Ct, PCM처리부(3)에서 출력되는 스크램블 식별 신호주기를 St라할때 상기 마이컴(4)의 실정된 값(M)은The microcomputer 4 according to claim 1, wherein the read period of the microcomputer 4 is Ct and the scramble identification signal period output from the PCM processing unit 3 is St. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910005661A 1991-04-09 1991-04-09 Scrambling signal switching circuit of charged broadcasting systems KR940000941B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910005661A KR940000941B1 (en) 1991-04-09 1991-04-09 Scrambling signal switching circuit of charged broadcasting systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910005661A KR940000941B1 (en) 1991-04-09 1991-04-09 Scrambling signal switching circuit of charged broadcasting systems

Publications (2)

Publication Number Publication Date
KR920020848A true KR920020848A (en) 1992-11-21
KR940000941B1 KR940000941B1 (en) 1994-02-04

Family

ID=19313060

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910005661A KR940000941B1 (en) 1991-04-09 1991-04-09 Scrambling signal switching circuit of charged broadcasting systems

Country Status (1)

Country Link
KR (1) KR940000941B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100258922B1 (en) * 1994-04-07 2000-06-15 윤종용 Decoder switching device and control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100258922B1 (en) * 1994-04-07 2000-06-15 윤종용 Decoder switching device and control method thereof

Also Published As

Publication number Publication date
KR940000941B1 (en) 1994-02-04

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